Limited Slip Diff
- Thread starter steves944
- Start date
sawood12
New member
Not sure what the timescale on for the F35 - it is in the middle of the test programme right now. That will probably be the last manned fighter developed in the western world. Again that is an aircraft that was conceived back in around '96 and probably wont see service for another couple of years i'd guess.
The Royal Navy F35C variant is under threat though due to its cost. It is touted as a Harrier replacement and has a horizontally mounted fan 6 inches behind the pilots head which is driven from the main engine when in STOVL mode to create vertical thrust along with a vectored main engine nozzle which can bend down through 90 degrees. It is horrendously expensive and we are now looking at a navalised version of the Eurofighter Typhoon or the F35B, which is a conventional carrier variant, as a cheaper alternative to operate on our fancy new aircraft carriers that are being built, rather than using STOVL like the Harrier. You can't beat the Harrier for achieving STOVL through a very simple nozzle system - the system on the F35 'Lightning' is so complex and can't do alot of what the Harrier can do - though it is Supersonic and stealthy, which the Harrier isn't.
I'm not sure the 997 GT3RS has such a sophisticated traction control system does it? It certainly isn't anywhere near as advanced as those on the Ferarri's and Lambo's which use fancy computer controlled differentials vs the GT3RS' relatively Victorian conventional gearbox, clutch and mechanical 'dumb' LSD. I think the GT3RS can do what it can do through simple but very effective old fashioned engineering.
The Royal Navy F35C variant is under threat though due to its cost. It is touted as a Harrier replacement and has a horizontally mounted fan 6 inches behind the pilots head which is driven from the main engine when in STOVL mode to create vertical thrust along with a vectored main engine nozzle which can bend down through 90 degrees. It is horrendously expensive and we are now looking at a navalised version of the Eurofighter Typhoon or the F35B, which is a conventional carrier variant, as a cheaper alternative to operate on our fancy new aircraft carriers that are being built, rather than using STOVL like the Harrier. You can't beat the Harrier for achieving STOVL through a very simple nozzle system - the system on the F35 'Lightning' is so complex and can't do alot of what the Harrier can do - though it is Supersonic and stealthy, which the Harrier isn't.
I'm not sure the 997 GT3RS has such a sophisticated traction control system does it? It certainly isn't anywhere near as advanced as those on the Ferarri's and Lambo's which use fancy computer controlled differentials vs the GT3RS' relatively Victorian conventional gearbox, clutch and mechanical 'dumb' LSD. I think the GT3RS can do what it can do through simple but very effective old fashioned engineering.
DivineE
New member
About the diff, actually the early (85-86 turbos) all came with oil coolers on the gearbox with or without lsd installed so you'll have to check the code or lift the wheels.
I also owned a converted 1986 m030 car that i was convinced had an lsd as I drifted often in the car and it would almost always leave two perfect lines of rubber if you span the wheels from a standing start but once up on ramps we realised it was only an open diff. It goes to show the balance of the car compared to my e36 bmw which had an open diff and wouldn't drift at all.. Only span the inside rear.
Ps to the man who prefered the 964 to the gt3 for it's purity. You need to experience a nissan gtr and then step aright into the gt3 like I did! Wow what a difference.
I also owned a converted 1986 m030 car that i was convinced had an lsd as I drifted often in the car and it would almost always leave two perfect lines of rubber if you span the wheels from a standing start but once up on ramps we realised it was only an open diff. It goes to show the balance of the car compared to my e36 bmw which had an open diff and wouldn't drift at all.. Only span the inside rear.
Ps to the man who prefered the 964 to the gt3 for it's purity. You need to experience a nissan gtr and then step aright into the gt3 like I did! Wow what a difference.
Neil Haughey
New member
Sorry for the OT again. My bet would be the F35 never sees UK service, the pressure building up around the various end customers is to pull out or reduce numbers all of which would make the unit cost higher and make it even less desirable. Then you end up in project death spiral.
ISTR the C variant is already dead isn't it? I thought the only customer was USMC as the RN carrier will have a cat 'n' trap.
ISTR the C variant is already dead isn't it? I thought the only customer was USMC as the RN carrier will have a cat 'n' trap.
Ben that was me re the 964 RS and GT RS, are you saying the GTR is a better car than the GT3 RS ?
Need to check my diff now as i thought that all lsd had oil cooler, will check the build stickers the morrow, not changing it if it is not the case though £££
Where is my badge panel ??
Keeping WUF ?
Pretty sure i would be after getting all that bodywork done, do some miles in i. [
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Need to check my diff now as i thought that all lsd had oil cooler, will check the build stickers the morrow, not changing it if it is not the case though £££
Where is my badge panel ??
Keeping WUF ?
Pretty sure i would be after getting all that bodywork done, do some miles in i. [
]
Neil Haughey
New member
Its a good point to add that the fact it works with the wheels off the ground is no guarantee that it will work so well with the full torque of the engine applied in the lower gears. A mate of mine has been stripping an old sierra fitted with an LSD and was telling me last week about how they couldn't stop both wheels from turning together.
944 man
Active member
LSD check: park car on garden; engage first gear; hold 6,000RPM; look in rear view mirror; dump clutch.
One stream of turf, soil and flowers = no LSD.
Two streams of turf, soil and flowers = LSD fitted.
M220 was an available option for the life of the model, but few cars have it fitted.
Simon []
One stream of turf, soil and flowers = no LSD.
Two streams of turf, soil and flowers = LSD fitted.
M220 was an available option for the life of the model, but few cars have it fitted.
Simon [
]
sawood12
New member
There is alot of political pressure to remain involved in the project as the proportion of the aircraft a country buys determines how much of the aircraft that country manufactures, and therefore how much of a slice of the market they get. The F35 (or Joint Strike Fighter as it was originally known) was intended to be a cheap mass produced stealthy 5th generation fighter with a huge export market - but it has turned out to be hugely expensive. The Rolls-Royce and Allison are really pushing for the STOVL version as they build the horizontal lift fan and the RN want them for the STOVL capability. The jury is still out. The new carriers will have cat'n'trap, but that is so we can receive aircraft from other airforces during joint operations - we are now also effectively sharing them with the French who operate Rafales and Mirages on their aircraft carriers.
The RN varient is still on at the moment, but under threat due to government cuts. A navalised Eurofighter sounds on paper to be a cheaper option, but the aircraft was never conceived as a navy aircraft and is not optimally configured - for example, the front canards are in front and below the cockpit, whereas for a navalised aircraft they would ideally be behind and above the cockpit like with the Dassault Rafale. I think if they ditch the STOVL F35C then the RN will go for the F35B, which is a navalised version for a conventional carrier (bigger wings, strengthened undercarriage etc). The F35A is the faster dogfighter F16 replacement.
Neil Haughey
New member
Not stupid at all. Its only politicians who seem to think these things have to be done as multi-national efforts (Submarines such as Astute prove we certainly have the industrial capability to design and build world class big ticket equipment, the much more expensive Virgina class is arguably the only thing that can touch it). There is also this huge myth that the US is great at this sort of thing (efficient, on time and budget) and euroland is rubbish. Its my personal opinion but the previous administration here was in love with the US and US companies.
The French have managed to keep a remarkable level of independence in this area, there really is no argument as to why the UK couldn't also.
The French have managed to keep a remarkable level of independence in this area, there really is no argument as to why the UK couldn't also.
Neil Haughey
New member
Scott, not forgetting the B should have a much greater range/endurance due to not needing a lift fan. Highly desirable I reckon for any Naval aircraft.
Can the Eurofighter airframe take a beefed up under carriage? If it can't and I suspect given it was never designed for cat'n'trap the answer is no then you are in to new airframes (reworked is not much different to new). Having said that though there are definite benefits to having commonality of engines, avionics, comms etc.
Can the Eurofighter airframe take a beefed up under carriage? If it can't and I suspect given it was never designed for cat'n'trap the answer is no then you are in to new airframes (reworked is not much different to new). Having said that though there are definite benefits to having commonality of engines, avionics, comms etc.
DivineE
New member
ORIGINAL: Frenchy
Ben that was me re the 964 RS and GT RS, are you saying the GTR is a better car than the GT3 RS ?
Need to check my diff now as i thought that all lsd had oil cooler, will check the build stickers the morrow, not changing it if it is not the case though £££
Where is my badge panel ??
Keeping WUF ?
Pretty sure i would be after getting all that bodywork done, do some miles in it. [
Ops. Sorry I read and didn't look at poster. No the gtr was terrible (in that way), gt3 felt so raw after it that I was amazed at your comment about how it felt like it was doing things for you.
I have the panel back, one of the black plastic inserts is missing but I have it now.
Whether I keep wuf or not long term is still very much in balance. That superlight 911 has made an impression on me that will not be forgotten, but short of having one built for me it's not an option at the moment and driving wuf in the meantime this summer is a very nice place to be.
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